From: Chris Metcalf <cmetcalf@tilera.com>
To: Marc Gauthier <marc@tensilica.com>
Cc: Arnd Bergmann <arnd@arndb.de>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
"linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>
Subject: Re: [PATCH] arch/tile: new multi-core architecture for Linux
Date: Fri, 28 May 2010 13:58:20 -0400 [thread overview]
Message-ID: <4C00043C.5030804@tilera.com> (raw)
In-Reply-To: <522C1DF17AF50042AD8AE87F7887BD3D01637144CA@exch.hq.tensilica.com>
On 5/27/2010 10:52 AM, Marc Gauthier wrote:
>>> We use [a syscall] not for the floating-point operations, but for integer
>>> divide-by-zero. In principle we could use it for floating-point too,
>>> but we currently don't, since generally folks don't expect it there.
>>>
>> Ah, I see. That probably makes a lot of sense to present as a signal
>> the way you do.
>>
> FWIW, this can also be done using some recognizable illegal
> instruction sequence, if the architecture reserves some opcodes
> as always illegal.
We do reserve a range of illegal values, and this is a great idea. I've
removed the syscall from our kernel, and will add support for the
appropriate magic in the trap handler once we pick an encoding and give
it a name in the assembler.
--
Chris Metcalf, Tilera Corp.
http://www.tilera.com
next prev parent reply other threads:[~2010-05-28 17:58 UTC|newest]
Thread overview: 110+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-20 5:43 [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-20 8:04 ` Barry Song
2010-05-20 14:32 ` Linus Torvalds
2010-05-20 19:10 ` Chris Metcalf
2010-05-21 4:52 ` Barry Song
2010-05-21 15:13 ` Chris Metcalf
2010-05-20 19:12 ` [PATCH] generic: make lowmem_page_address() use PFN_PHYS() for improved portability Chris Metcalf
2010-05-22 4:05 ` [PATCH] arch/tile: new multi-core architecture for Linux Chris Metcalf
2010-05-23 22:08 ` Arnd Bergmann
2010-05-24 15:29 ` Chris Metcalf
2010-05-24 18:53 ` Arnd Bergmann
2010-05-24 21:29 ` Chris Metcalf
2010-05-25 13:54 ` Chris Metcalf
2010-05-25 15:03 ` Arnd Bergmann
2010-05-25 15:13 ` Chris Metcalf
2010-05-25 15:30 ` Arnd Bergmann
2010-05-26 2:44 ` liqin.chen
2010-05-26 2:44 ` liqin.chen
2010-05-26 13:45 ` Chris Metcalf
[not found] ` <4BFBE005.2070500@tilera.com>
[not found] ` <201005251721.23782.arnd@arndb.de>
2010-05-26 23:05 ` Chris Metcalf
2010-05-26 5:02 ` Paul Mundt
2010-05-25 21:45 ` Arnd Bergmann
2010-05-27 0:58 ` Chris Metcalf
2010-05-27 8:41 ` Arnd Bergmann
2010-05-27 13:30 ` Chris Metcalf
2010-05-27 13:41 ` Geert Uytterhoeven
2010-05-27 13:48 ` Paul Mundt
2010-05-27 14:11 ` Arnd Bergmann
2010-05-27 14:35 ` Chris Metcalf
2010-05-27 15:02 ` Arnd Bergmann
2010-05-27 15:04 ` Chris Metcalf
2010-05-27 15:20 ` Arnd Bergmann
2010-05-27 14:52 ` Marc Gauthier
2010-05-28 17:58 ` Chris Metcalf [this message]
2010-05-27 15:03 ` Chris Metcalf
2010-05-27 20:34 ` Jamie Lokier
2010-05-27 20:53 ` Arnd Bergmann
2010-05-28 16:45 ` Chris Metcalf
2010-05-28 17:16 ` Arnd Bergmann
2010-05-28 17:28 ` Chris Metcalf
2011-05-16 18:23 ` [PATCH] arch/tile: support signal "exception-trace" hook Chris Metcalf
2011-05-18 18:14 ` Chris Metcalf
2011-05-17 20:26 ` [PATCH] arch/tile: add /proc/tile, /proc/sys/tile, and a sysfs cpu attribute Chris Metcalf
2011-05-19 13:41 ` Arnd Bergmann
2011-05-19 15:12 ` Chris Metcalf
2011-05-19 15:22 ` Arnd Bergmann
2011-05-19 15:22 ` Arnd Bergmann
2011-05-20 14:26 ` Chris Metcalf
2011-05-20 14:26 ` Chris Metcalf
2011-05-20 14:37 ` Arnd Bergmann
2011-05-20 15:00 ` Chris Metcalf
2011-05-20 15:13 ` Arnd Bergmann
2011-05-20 19:59 ` Arnd Bergmann
2011-05-20 19:59 ` Arnd Bergmann
2011-05-25 19:09 ` Chris Metcalf
2011-05-25 19:17 ` Chris Metcalf
2011-05-25 19:18 ` Chris Metcalf
2011-05-25 19:18 ` Chris Metcalf
2011-05-25 20:20 ` Arnd Bergmann
2011-05-25 20:20 ` Arnd Bergmann
2011-05-25 20:31 ` Chris Metcalf
2011-05-25 20:31 ` Chris Metcalf
2011-05-25 20:34 ` Arnd Bergmann
2011-05-25 20:34 ` Arnd Bergmann
2011-05-20 15:13 ` Arnd Bergmann
2011-05-20 15:00 ` Chris Metcalf
2011-05-20 14:37 ` Arnd Bergmann
2011-05-24 15:38 ` Arnd Bergmann
2011-05-24 15:38 ` Arnd Bergmann
2011-05-26 16:40 ` [PATCH v2] arch/tile: more /proc and /sys file support Chris Metcalf
2011-05-26 16:40 ` Chris Metcalf
2011-05-27 14:23 ` Arnd Bergmann
2011-05-27 14:23 ` Arnd Bergmann
2010-05-24 20:22 ` [PATCH] arch/tile: new multi-core architecture for Linux Sam Ravnborg
2010-05-24 21:30 ` Chris Metcalf
2010-05-25 5:02 ` Sam Ravnborg
2010-05-25 20:12 ` Thomas Gleixner
2010-05-26 1:57 ` Chris Metcalf
2010-05-26 16:22 ` Chris Metcalf
2010-05-26 17:09 ` Arnd Bergmann
2010-05-29 3:01 ` [PATCH 1/8] Fix up the "generic" unistd.h ABI to be more useful Chris Metcalf
2010-05-29 3:01 ` Chris Metcalf
2010-05-29 3:09 ` [PATCH 2/8] arch/tile: infrastructure and configuration-related files Chris Metcalf
2010-05-29 3:09 ` Chris Metcalf
2010-05-31 7:47 ` Paul Mundt
2010-06-03 17:54 ` Chris Metcalf
2010-05-29 3:10 ` [PATCH 3/8] arch/tile: header files for the Tile architecture Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-06-03 21:32 ` [PATCH] arch/tile: respond to reviews of the second code submission Chris Metcalf
2010-06-04 0:50 ` Paul Mundt
2010-06-04 1:31 ` FUJITA Tomonori
2010-06-07 5:25 ` FUJITA Tomonori
2010-05-29 3:10 ` [PATCH 4/8] arch/tile: core kernel/ code Chris Metcalf
2010-05-31 2:58 ` FUJITA Tomonori
2010-05-29 3:11 ` [PATCH 5/8] arch/tile: the kernel/tile-desc_32.c file Chris Metcalf
2010-05-29 3:13 ` [PATCH 6/8] arch/tile: the mm/ directory Chris Metcalf
2010-05-29 3:16 ` [PATCH 7/8] arch/tile: lib/ directory Chris Metcalf
2010-05-29 3:16 ` Chris Metcalf
2010-05-29 3:17 ` [PATCH 8/8] arch/tile: hypervisor console driver Chris Metcalf
2010-05-29 3:17 ` Chris Metcalf
2010-05-29 3:20 ` [PATCH 0/8] revised patch for arch/tile/ support Chris Metcalf
2010-05-29 3:20 ` Chris Metcalf
2010-05-29 11:29 ` Arnd Bergmann
2010-06-03 20:40 ` Arnd Bergmann
2010-06-03 21:48 ` Chris Metcalf
2010-06-04 21:32 ` Chris Metcalf
2010-06-05 12:56 ` Stephen Rothwell
2010-06-05 13:30 ` Chris Metcalf
2010-06-05 14:10 ` Stephen Rothwell
[not found] ` <dVZMmBu$KHA.5388@exchange1.tad.internal.tilera.com>
2010-05-29 3:20 ` Chris Metcalf
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